Submission #8096

#	Time	Username	Problem	Language	Result	Execution time	Memory
8096		gs14004	전봇대 (KOI13_pole)	C++98	100 / 100	32 ms	2648 KiB

pole

#include <cstdio>
#include <algorithm>
using namespace std;
typedef long long lint;

struct pole{lint a,i;}d[100005];
int cmp(pole a, pole b){return a.a * b.i < b.a * a.i;}

lint n;
lint trial(int piv){
    lint res = 0;
    for (int i=0; i<n; i++) {
        res += max(d[i].a - piv * d[i].i, piv * d[i].i - d[i].a);
    }
    return res;
}

int main(){
    scanf("%lld",&n);
    for (int i=0; i<n; i++) {
        scanf("%lld",&d[i].a);
        d[i].i = i;
    }
    int s = 0, e = 1e9;
    while (s != e) {
        int m = (s+e)>>1;
        if(trial(m) > trial(m+1)) s = m+1;
        else e = m;
    }
    printf("%lld",trial(s));
}

• Subtask 1: 11 / 11
• Subtask 2: 21 / 21
• Subtask 3: 31 / 31
• Subtask 4: 37 / 37